/* Copyright (C) 1999 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: gdevmrun.h,v 1.5 2002/06/16 07:25:26 lpd Exp $ */
/* Definition of run-length encoded memory device */

#ifndef gdevmrun_INCLUDED
#  define gdevmrun_INCLUDED

/*
 * This memory device stores full-size pixels with run-length
 * encoding if possible, switching to the standard uncompressed
 * representation if necessary.
 */

#include "gxdevmem.h"

/*
 * Define the device, built on a memory device.
 */
typedef struct gx_device_run_s {
    gx_device_memory md;	/* must be first */
    uint runs_per_line;
    int umin, umax1;		/* some range of uninitialized lines */
    int smin, smax1;		/* some range in standard (not run) form */
    /*
     * Save memory device procedures that we replace with run-oriented
     * ones, for use with the uncompressed representation.
     */
    struct sp_ {
	dev_proc_copy_mono((*copy_mono));
	dev_proc_copy_color((*copy_color));
	dev_proc_fill_rectangle((*fill_rectangle));
	dev_proc_copy_alpha((*copy_alpha));
	dev_proc_strip_tile_rectangle((*strip_tile_rectangle));
	dev_proc_strip_copy_rop((*strip_copy_rop));
	dev_proc_get_bits_rectangle((*get_bits_rectangle));
    } save_procs;
} gx_device_run;

/*
 * Convert a memory device to run-length form.  The mdev argument should be
 * const, but it isn't because we need to call gx_device_white.
 */
int gdev_run_from_mem(gx_device_run *rdev, gx_device_memory *mdev);

#endif /* gdevmrun_INCLUDED */